The file you download will be a .cab file. The .cab file is the installation program
for the client software.
Download (non touchscreen) Client
Use ActiveSync to copy this .cab file onto your device. Once the file is on your
device locate it using File Explorer and single click the file to install.
Please note that the client you download will be mostly pre-configured.
You will only need to enter your GooSync login details.
The information below is mainly for reference.
Configuration
On your mobile device, from the 'Start' menu click 'GooSync'.
You will see the screen below:

To alter the settings of this profile open the menu and select 'Settings' then 'Server'.
The following screen will appear:
The 'User Name' and 'Password' settings must be set to the same login details that
you use for your GooSync.com account (these may not be the same as your Google
Calendar account).
Adding Contacts Support
If you are using the GooSync Premium account you will need to activate Contacts
on your GooSync client.
To do this you first need to ensure that you are using the latest release of the
GooSync client. You can do this by using the Check for updates option inside
your client.
Once you are using the latest release of the client you simply need to perform a
sync with your GooSync Premium account. When this sync is complete you will see
the Contacts options appear on the main page of your client.
Select the Contacts check box and sync again.
Download (non touchscreen) Client